| (19) |
 |
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(11) |
EP 1 195 427 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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09.04.2003 Bulletin 2003/15 |
| (43) |
Date of publication A2: |
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10.04.2002 Bulletin 2002/15 |
| (22) |
Date of filing: 26.09.2001 |
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| (84) |
Designated Contracting States: |
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AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
Designated Extension States: |
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AL LT LV MK RO SI |
| (30) |
Priority: |
28.09.2000 JP 2000295600
|
| (71) |
Applicant: Nippon Mitsubishi Oil Corporation |
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Minato-ku, Tokyo 105-8412 (JP) |
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| (72) |
Inventors: |
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- Yagishita, Kazuhiro, Nippon Mitsubishi Oil Corp.
Yokohama-shi, Kanagawa-ken 231-0815 (JP)
- Igarashi, Jinichi, Nippon Mitsubishi Oil Corp.
Yokohama-shi, Kanagawa-ken 231-0815 (JP)
- Kurosawa, Osamu, Nippon Mitsubishi Oil Corp.
Yokohama-shi, Kanagawa-ken 231-0815 (JP)
|
| (74) |
Representative: Modin, Jan |
|
Ehrner & Delmar Patentbyra AB Box 10316
100 55 Stockholm
100 55 Stockholm (SE) |
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| |
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| (54) |
Lubricant compositions suitable as engine oils |
(57) Lubricant compositions comprise a lubricant base oil, and (A) a mono substituted
amide type bissuccinimide in an amount from 0.5 to 20 percent by mass, (B) zinc dithiophosphate
in an amount from 0.05 to 0.3 percent by mass of phosphorus, and (C) a metal-based
detergent in an amount form 0.5 to 4.0 percent by mass of sulfated ash, based on the
total mass of the composition. Lubricant compositions preferably further comprises
(D) a dispersant type viscosity index improver in an amount from 0.1 to 20 percent
by mass, based on the total mass of the composition.